Question

The p.d across a 3ohm resistor carrying a current of 2A.
A. 1/2
B. 1
C. 2
D. 6
E. 8

Answer 1

Answer:

By keeping in mind the formula i.e.

P= V square/ R

We will first calculate the voltage by Ohm's Law, V= IR= 2*3=6

So, V= 6 and R=3

P=6*6/3= 36/3= 12

Therefore, 12 watt is the answer